[sw/ottf] Rename test_rom_ext to ottf_start

Previously the boot sequence for chip level tests looked like:

chip reset --> test_rom --> test_rom_ext --> ottf --> test_main()

In the above sequence the `test_rom_ext` was really just an ASM file
that performed initializations prior to jumping to the OTTF `main()`.
However, as we refactor the OTTF to enable running chip-level tests at
various boot stages (e.g., ROM_EXT and BL0, see #10498), it makes more
sense to model the combined OTTF and test bundle as its own boot stage
that can be run in inplace of the ROM_EXT or BL0.

Therefore, this commit renames/consolidates the test_rom_ext into a
component of the OTTF, called the `ottf_start`. The `ottf_start` is kept
as a separate static library from the `ottf` to enable running tests
that do not use the OTTF, i.e. the crt_test (which tests the
functionality of the `ottf_start` library), and the "Hello World"
example programs. However, when test images are built, both the
`ottf_start` and `ottf` are linked with the test library itself, to
create one cohesive "test boot stage".

The new boot sequence for a test will look like:

chip reset --> test_rom --> ottf --> test_main(),

where OTTF = (ottf_start --> OTTF).

This partially addresses a task in #10498.

Signed-off-by: Timothy Trippel <ttrippel@google.com>
31 files changed
tree: d6b8181e0661f199de5c2f53bae7f6a230cf664e
  1. .github/
  2. ci/
  3. doc/
  4. hw/
  5. rules/
  6. site/
  7. sw/
  8. test/
  9. third_party/
  10. util/
  11. .bazelignore
  12. .bazelrc
  13. .bazelversion
  14. .clang-format
  15. .dockerignore
  16. .flake8
  17. .gitignore
  18. .style.yapf
  19. .svlint.toml
  20. .svls.toml
  21. _index.md
  22. apt-requirements.txt
  23. azure-pipelines.yml
  24. BUILD
  25. check_tool_requirements.core
  26. CLA
  27. COMMITTERS
  28. CONTRIBUTING.md
  29. LICENSE
  30. meson.build
  31. meson_init.sh
  32. meson_options.txt
  33. python-requirements.txt
  34. README.md
  35. tool_requirements.py
  36. toolchain.txt
  37. topgen-reg-only.core
  38. topgen.core
  39. WORKSPACE
  40. yum-requirements.txt
README.md

OpenTitan

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About the project

OpenTitan is an open source silicon Root of Trust (RoT) project. OpenTitan will make the silicon RoT design and implementation more transparent, trustworthy, and secure for enterprises, platform providers, and chip manufacturers. OpenTitan is administered by lowRISC CIC as a collaborative project to produce high quality, open IP for instantiation as a full-featured product. See the OpenTitan site and OpenTitan docs for more information about the project.

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This repository contains hardware, software and utilities written as part of the OpenTitan project. It is structured as monolithic repository, or “monorepo”, where all components live in one repository. It exists to enable collaboration across partners participating in the OpenTitan project.

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